Here's a number that should scare you: 30. That's how many years you might spend in retirement. And if your money is sitting in a typical target date fund, it's probably not growing fast enough to keep up.
Target date funds — those set-it-and-forget-it investments that automatically shift from stocks to bonds as you age — are the default choice for millions of Americans. They're in your 401(k), your IRA, maybe even your pension if you're lucky. They're marketed as the safe, sensible option. But here's the dirty secret: they're so cautious they're practically guaranteeing you'll run out of cash.
Let me be blunt. The whole point of these funds is to protect you from market crashes as you near retirement. But in doing so, they're starving your portfolio of growth. And with life expectancies climbing — a 65-year-old today can expect to live another 20 years, and many will make it to 90 or beyond — that's a recipe for disaster.
The Glide Path Problem
Target date funds work on a simple idea: the "glide path." You're 30, you're 90% in stocks. You're 60, you're down to 50%. By the time you hit 65, you're mostly in bonds. Sounds prudent, right? Wrong.
Here's what that actually means in practice. Say you're 55, you've got $500,000 saved. Your target date fund has already shifted you to 60% stocks, 40% bonds. The stock market delivers its historical average of about 7% a year after inflation. Your bonds return maybe 2%. Your blended return? Around 4.5%. That might sound okay, but it's not enough to sustain 30 years of withdrawals.
Financial planners use the "4% rule" — withdraw 4% of your portfolio in the first year of retirement, adjust for inflation, and you'll make it 30 years. That rule assumes a portfolio with at least 60% stocks. But target date funds often glide down to 30% or even 20% stocks by retirement. At that allocation, the 4% rule breaks. You'll either have to slash your living standards or pray you die early.
"The default is to protect you from losing money, but the biggest risk is outliving your savings," says David Blanchett, head of retirement research at PGIM.
And it's not just the asset allocation. These funds are stuffed with fees. The average target date fund charges around 0.5% annually. That doesn't sound like much, but over 30 years, it eats roughly 15% of your final balance. Some funds charge more than 1%. You're paying for the privilege of underperformance.
The Longevity Trap
Here's the uncomfortable truth: we're living longer, but our retirement system hasn't caught up. In 1940, a 65-year-old could expect to live to 79. Today, it's 85 for women, 82 for men. And among the affluent, those numbers are even higher. The Social Security Administration's own data shows that a quarter of today's 65-year-olds will live past 90.
That means your retirement isn't a cruise around the world for a few years. It's a marathon. And target date funds are built for a sprint.
Consider this: the stock market has never lost money over any 20-year period. Never. Not during the Great Depression, not during the 2008 crash. Yet target date funds are so terrified of a downturn that they yank you out of stocks right when you need them most — because you still have two or three decades of spending ahead.
This isn't just theoretical. A 2024 study by the Center for Retirement Research at Boston College found that the typical target date fund's allocation at retirement would leave a median-income household with a 40% chance of running out of money. Forty percent. That's a coin flip.
The Industry Is Fighting Change
You'd think the fund industry would be scrambling to fix this. Instead, they're circling the wagons. The big players — Vanguard, Fidelity, BlackRock — control the market, and they're making bank on status quo. They'll tell you that "risk management" is their priority. They'll say "we're being prudent." What they mean is: we're afraid of lawsuits.
If a fund is too aggressive and the market crashes right before retirement, they'll be blamed. So they'd rather have you run out of money quietly at 85 than face a class-action suit at 65. That's the perverse incentive at work.
Some funds are starting to shift. Vanguard introduced a "Retirement Income" series that keeps you at 30% stocks even after retirement. But that's still below what the research says is needed. And most funds haven't budged. The inertia is staggering.
"The industry has a massive conflict of interest," says Teresa Ghilarducci, a labor economist at the New School. "They're managing assets, not outcomes."
What You Can Do About It
So what's a regular person supposed to do? You've got three options.
First, if you're still working, don't just accept the default. Look at your target date fund and see what it's actually invested in. Most 401(k) platforms let you see the breakdown. If you're 10 years from retirement and you're more than 50% in bonds, that's not "safe" — that's a death sentence for your retirement.
Second, consider splitting your money between a target date fund and a simple S&P 500 index fund. You'll keep the automatic rebalancing, but you'll also get the growth you need. Even a 20% allocation to an index fund can make a difference.
Third, if you're already retired, don't panic and stock up on bonds. You need stocks to keep your money growing. A 50% stock allocation is the minimum for a 30-year retirement, according to most studies. And consider delaying Social Security — every year you wait increases your benefit by 8%, which is a risk-free return you can't get anywhere else.
But ultimately, this is a systemic failure. The government sets these funds as the default in auto-enrollment plans. The Department of Labor blessed them. And they're failing us. It's time for regulators to step in and require funds to disclose "probability of success" — the chance that you won't run out of money. Right now, that information is buried in footnotes. It should be front and center.
Look, I'm not saying target date funds are worthless. They're better than cash. They're better than most people's DIY investing. But they're not good enough. And "better than nothing" isn't the standard we should hold for something that's supposed to fund your final decades.
You work your whole life. You scrimp, you save, you sacrifice. You deserve better than a 40% chance of going broke. And the people managing your money know it. They just don't care enough to change.
So here's the question you need to ask yourself: when you're 85 and the money runs out, are you going to be glad you played it safe? I didn't think so.
